Enable user change background image in settings page in Aura build.

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains definitions of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 12452 matching lines @@
       </message>
       <message name="IDS_OPTIONS_ACCOUNTS_OWNER_ONLY" desc="In the Accounts settings tab, the warning text noticing that only the owner can modify these settings.">
         These settings may only be modified by the owner:
       </message>
       <message name="IDS_OPTIONS_PERSONAL_ACCOUNT_GROUP_NAME" desc="In sentence case: In the Personal Stuff settings tab, the title text for Account section.">
         Account
       </message>
       <message name="IDS_OPTIONS_ENABLE_SCREENLOCKER_CHECKBOX" desc="In the Personal Stuff settings tab, the text on the checkbox to enable screenlocker for current user.">
         Require password to wake from sleep
       </message>
+      <message name="IDS_SET_WALLPAPER_BUTTON" desc="The button to set wallpaper.">
+        Set Wallpaper...
+      </message>
+      <message name="IDS_OPTIONS_SET_WALLPAPER_DIALOG_TITLE" desc="Title of the dialog shown when user wants to change his/her wallpaper.">
+        Set Wallpaper
+      </message>
+      <message name="IDS_OPTIONS_SET_WALLPAPER_DIALOG_TEXT" desc="Text with description of what to do on Change Wallpaper dialog.">
+        Choose a picture to display on your background.
+      </message>
       <message name="IDS_OPTIONS_CHANGE_PICTURE" desc="In the settings tab, the text on the button to change picture for the current user.">
         Change picture...
       </message>
       <message name="IDS_OPTIONS_CHANGE_PICTURE_CAPTION" desc="Caption on the user picture that user must click to change it, must be short.">
         Change
       </message>
       <message name="IDS_OPTIONS_CHANGE_PICTURE_DIALOG_TITLE" desc="Title of the dialog shown when user wants to change his/her picture.">
         Change picture
       </message>
       <message name="IDS_OPTIONS_CHANGE_PICTURE_DIALOG_TEXT" desc="Text with description of what to do on Change picture dialog.">
@@ skipping 2703 matching lines @@
     </messages>
     <structures fallback_to_english="true">
       <!-- Make sure these stay in sync with the structures in generated_resources.grd. -->
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
   </release>
 </grit>